60results about How to "Increase the conductive path" patented technology

The invention provides a front silver paste for a crystalline silicon solar battery plate. The front silver paste comprises silver powder, an inorganic adhesive, an organic resin, an organic solvent, an additive, and organic silver salt. In the silver paste provided by the invention, by adding the organic silver salt, from which nano-scale silver particles and submicron-scale silver particles can be separated out by thermolysis, and filling the gaps of the silver powder with the silver particles separated out by the thermolysis, the contact area among the particles is effectively increased, the conducting path is enhanced, and the conductivity of a film layer is improved; meanwhile, the stacking density of the film layer is also improved and the shrinkage rate of the film layer is reduced. The invention also provides a preparation method of the front silver paste for the crystalline silicon solar battery plate.

A method and system for improving the electrical conductivity of the nodes of a nanotube net and related materials. A method for adding material to the nodes of a nanotube net that provides more pathways and connections to guarantee good electrical conductance between one electrode and another and speeds the transmission of charge carriers by providing alternative pathways. These improvements may include an enhanced overall thermal conductivity of the CNT net and enhanced mechanical performance of the CNT net. The present disclosure improves, either independently or jointly, electrical, thermal, or mechanical properties of CNT nets. Further, optical transmission does not worsen significantly.

The invention relates to a resistance-type flexible pressure sensor and a preparation method thereof, and the preparation method comprises the steps: providing a first flexible substrate, employing laser to etch one surface of the first flexible substrate, and forming microstructures with at least two heights; forming a conductive layer on the surface, with the microstructures, of the first flexible substrate to obtain a first flexible substrate; providing a second flexible substrate, wherein the second flexible substrate comprises a second flexible substrate and an electrode arranged on one surface of the second flexible substrate; and arranging the second flexible substrate on the first flexible substrate in a stacked manner, and enabling the electrode to be in contact with part of the conductive layer to obtain the resistance-type flexible pressure sensor. The preparation method is simple in process, easy to control and suitable for industrial large-scale production, and the obtained sensor can improve the detection range and reliability while improving the sensitivity.

The invention discloses conducting ink, which is prepared from the following ingredients in parts by mass: 35 to 55 parts of conducting filling materials, 20 to 30 parts of bonding agents, 9 to 21 parts of solvents and 2 to 5 parts of auxiliary agents, wherein the conducting filling materials comprise grapheme, flaky silver powder and ball-shaped silver powder; the grapheme accounts for 0.2 to 2 parts of the total amount of the conducting filling materials; the flaky silver powder accounts for 30 to 40 parts of the total amount of the conducting filling materials; the ball-shaped silver powder accounts for 5 to 15 parts of the total amount of the conducting filling materials. The invention also discloses a preparation method of the conducting ink. The method comprises the following steps of (1) bonding agent preparation; (2) grapheme precursor preparation; (3) crude pulp preparation; (4) grinding and filtering; (5) finished product obtaining. The preparation method has the advantages that the conducting performance and the anti-bending performance of the ink can be obviously improved; in addition, the characteristics of wide printing applicability, low conducting ink solid content and the like are realized.

The invention belongs to the field of the synthesis of polymer materials, and particularly relates to an antistatic polyurethane elastomer and a preparation method thereof. The antistatic polyurethaneelastomer is prepared from the following raw materials: polymer polyol, isocyanate, a chain extender, an antioxidant, modified graphene and a catalyst. The modified graphene is added in the followingway: the modified graphene is added into the chain extender to form modified graphene-chain extender dispersion liquid under an ultrasonic condition. Groups contained in the surface of the modified graphene such as hydroxyl, carboxyl, and amino react with-NCO, the antistatic polyurethane elastomer obtained by virtue of an in-situ polymerization way has lower surface resistivity and volume resistivity, higher mechanical performance and good wear resistance and heat stability, and can be applied to the fields such as polyurethane textiles.

The invention discloses a waterborne epoxy graphene zinc anticorrosive coating. The waterborne epoxy graphene zinc anticorrosive coating comprises a first component and a second component, wherein thefirst component is prepared from the following components in parts by weight: 5-10 parts of a waterborne epoxy resin curing agent, 0.5-1 part of a dispersant, 1-3 parts of an anti-settling agent, 1-3parts of a coalescing agent, 10-15 parts of body pigment, 42-65 parts of zinc powder and 4.5-5 parts of graphene dispersion slurry. The second component is prepared from the following components in parts by weight: 30-40 parts of aqueous epoxy emulsion, 1-2 parts of an anti-flash rust agent, 5-15 parts of water and 0.2-0.8 part of a defoaming agent. The waterborne epoxy graphene zinc anticorrosive coating has high utilization rate of zinc powder and is easy to prepare, and the formed coating has excellent comprehensive properties, such as good compactness, excellent cathodic protection performance and shielding performance, anticorrosive performance is remarkably improved, and the waterborne epoxy graphene zinc anticorrosive coating has wide application prospects in the field of marine equipment anticorrosion.

The invention relates to Mxene-PDMS composite foam with a hollow structure, and a preparation method and application of the Mxene-PDMS composite foam. A sensing active part of a sensor is the Mxene-PDMS hollow foam. In the hollow Mxene-PDMS foam, Mxene is dispersed in inner surfaces of the foam holes. According to the invention, the Mxene-PDMS foam with a well-bent hollow structure can be obtainedby optimizing the impregnation times of Mxene nanosheets in a process of preparing the sensor and by optimizing the treatment steps of the usage amount of a PDMS curing agent required in the preparation process and the like. Due to lap joint of a Mxene sheet layer on the inner surfaces of the holes, the Mxene sheet layer is shaken when being subjected to external micro stimulation, and the Mxenesheet layer is more sensitive to detection under micro pressure. According to the design of the hollow structure, stable circulation performance and sensitivity can be achieved when large-angle bending and compression are carried out.

The technical invention introduces an organic silica gel/three-dimensional graphene carbon nanocomposite-based small-sized pressure sensor. Graphene-like carbon nanomaterials have high application value in the fields such as supercapacitors, lithium ion battery anodes, catalysis, adsorption, and sensors. According to the small-sized pressure sensor of the invention, a three-dimensional graphene-like carbon nanomaterial is obtained by means of a thermochemical reaction between magnesium powder and carbon disulfide; and the three-dimensional graphene-like carbon nanomaterial, adopted as a conductive medium, fills polydimethylsiloxane silica gel, so that a piezoresistive sensing material can be obtained; and a laser marking machine is adopted to etch an interdigital pattern on a Cu/PET thin film; and the interdigital pattern is coated with a liquid PDMS (polydimethylsiloxane) nanocomposite material, the liquid PDMS nanocomposite material is solidified, so that the small-sized pressure sensor can be obtained. The device has the advantages of wide measurement range and high sensitivity. The small-sized pressure sensors can be made into an array which can be applied to plantar pressure distribution testing or other fields.

The invention discloses a highly-conductive flexible graphene tube and a preparation method thereof. The method comprises the following steps: (1) adjusting an interfiber gap of a high-molecular polymer fiber bundle used as a deposition substrate; (2) electrostatically spraying graphene oxide; (3) soaking a composite material in a GaCl2 solution to enhance the mechanical properties of the fibers;(4) performing chemical pre-reduction on the graphene oxide; and (5) carrying out high-temperature heat treatment: completely reducing the graphene oxide and removing the deposition substrate in the sample to obtain the graphene tube. The graphene tube has a large specific surface area and high conductivity and flexibility, and can maintain stable conductivity after repeated bending. The preparation method for the graphene tube is simple in process and low in cost, and has good application prospects.

The invention provides a transverse high-pressure device and a manufacturing method thereof. A cellular structure of the device comprises a first conductive-type semiconductor substrate and second conductive-type semiconductor drift regions. The plurality of second conductive-type semiconductor drift regions are laminated from down to up in sequence. The method comprises the steps of: adopting an epitaxial technology to successively form the second conductive-type semiconductor drift regions; forming a first conductive-type semiconductor reduced-field layer, a second conductive-type semiconductor heavily doped layer and a first conductive-type semiconductor body region in each second conductive-type semiconductor drift region in an injecting manner. According to the invention, a conventional drift region structure is made into a drift region structure with a plurality of layers of superposed drift regions, so that each sub drift region is provided with a low-resistance nearest conductive path, and the conduction resistance of the device is lowered; and in an off state, the reduced-field layer in each drift region assists to consume the drift region, so that the breakdown voltage of the device is increased, and the contradiction relation between the conduction resistance and a withstand voltage is relieved.

The invention relates to a flexible piezoresistive sensor based on a porous microstructure and a preparation method thereof. The flexible piezoresistive sensor comprises a flexible substrate and an interdigital electrode arranged under the flexible substrate; the upper surface of the flexible substrate is a plane, and the lower surface of the flexible substrate is provided with a plurality of downwards-protruding microstructures; and a plurality of micropores are formed in the flexible substrate. According to the technical scheme, the flexible piezoresistive sensor has good pressure sensitivity, is suitable for detecting human pulse, throat pronunciation and pressure signals of other parts, and has the advantages of being high in sensitivity, low in cost, simple in process, suitable for mass production and the like.

The invention belongs to the technical field of power semiconductor devices and relates to a lateral trench insulated gate bipolar translator (IGBT) having a positive channel metal oxide semiconductor(PMOS) and its preparation method. Based on a lateral IGBT (LIGBT) device structure, a current carrier storage layer is added to the lateral-trench IGBT having the self-biased PMOS to enhance the conductivity modulation effect, and reduce the device conduction pressure drop; a side face of a grid electrode is wrapped by a sorting grid to reduce the Miller capacitance, reduce the turn-off time, reduce the turn-off loss, and improve the compromise between the forward conduction voltage drop and the turn-off loss; in the meanwhile, the gate charge of a device can be reduced, and drive loss is reduced; the compromise characteristic between a current decline rate (di/dt) and the conduction loss (Eon) is improved; automatic turn-on of a metal-oxide-semiconductor field-effect transistor (MOSFET)is self-biased during forward conduction, a voltage of a charge storage area is clamped, a saturation current is reduced and a short-circuit safe working area is optimized; the turn-on of the MOSFETself-biased in a preliminary stage is turned off, extraction of remaining current carriers of a drift region is accelerated, and the turn-off loss is reduced; a buried layer on a left side of trench gate can assist voltage resistance, and a blocking voltage is increased; and a thin gate oxide layer can reduce a threshold voltage of the device, and reduce the current densify of a latch.

The invention belongs to the field of conductive hydrogel, and particularly relates to a preparation method of environment-friendly self-healing conductive hydrogel. The process of the method is as follows. Preparing a sodium alginate aqueous solution as a solution A; adding a pyrrole monomer to form a solution B; adding a mixed solution C of sodium dodecyl benzene sulfonate and a multi-walled carbon nanotube to the solution B to form a solution D; adding the mixed solution D to the glass conical tube fixed with the circular glass slide sheet; carrying out cross-linking printing on the eCl3 solution to obtain an environment-friendly self-healing conductive hydrogel three-dimensional structure sample. According to the invention, sodium alginate is used as a matrix, and carbon nanotubes andpolypyrrole are used as conductive materials. The environment-friendly self-healing conductive hydrogel is prepared by adopting a 3D printing preparation process. According to the invention, the problems of poor conductivity, complex preparation process and unsatisfactory self-healing effect of the traditional conductive hydrogel are solved.

The invention provides a multi-channel horizontal high-voltage device. A cell structure is integrated on a semiconductor substrate of a first conductive type, and comprises a buried oxide layer, a semiconductor drift region of a second conductive type and a groove structure, a semiconductor body region of the first conductive type, a semiconductor source region of the second conductive type and asemiconductor contact region of the first conductive type form a body region unit, the device comprises at least one body region unit, and a multi-grid metal structure is arranged in the groove structure, comprises at least two metal grids, and provides at least two channels in the semiconductor body region of the first conductive type so as to provide a low-resistance channel for carriers. According to the high-voltage device, the structure that the groove includes multiple grids is used to increase channels, conductive paths of the device are increased, the conduction resistance of the device is reduced greatly, contradiction between the conduction resistance and withstand voltage is alleviated, and the conduction resistance is lower under the same chip area.

The invention discloses a power packaging structure and a lead frame thereof. The lead frame comprises a first set of pins and a second set of pins. A first surface of the first set of pins provides afirst contact surface for an internal electrical connection. The first surface of the second set of pins provides a second contact surface for the internal electrical connection, and the second set of pins respectively comprise a conductive strip and a plurality of protrusions extending on at least one side edge of the conductive strip, wherein the width direction of the plurality of protrusionsis parallel to the side edge of the conductive strip, and the width of the plurality of protrusions varies with the distance from the side edges of the conductive strip. According to the power packaging structure and the lead frame thereof, the lead frame in the power packaging structure provides a contact surface in electrical connection with a set of conductive posts using the protrusion of pinto improve current carrying capability and reduce the size of product.

The invention discloses a mixed coordination metal carbon nano-film hydrogel flexible bending sensing unit, a preparation method thereof and a flexible bending sensor, and the preparation method comprises the following steps: taking titanium and carbon as double targets, and generating a mixed coordination metal carbon nano-film by using a microwave plasma double-target magnetron sputtering technology; dispersing the mixed coordination metal carbon nano-film, a polymer preparation and a bipolar material in a water solvent, and carrying out ultrasonic stirring treatment to prepare the mixed coordination metal carbon nano-film hydrogel; then sequentially stacking metal electrodes and I-shaped adhesive tapes on the upper surface and the lower surface of the mixed coordination metal carbon nano-film hydrogel to prepare the mixed coordination metal carbon nano-film hydrogel flexible bending sensing unit. According to the invention, the hydrogel flexible bending sensing unit which is uniform in conductive network, high in sensitivity, stable in working and excellent in performance is manufactured through a simple stirring process, and therefore accurate measurement of external stimulation is achieved.

The invention discloses a SnO2/modified carbon nanotube composite electric heating thin film and a preparation method thereof. The composite electric heating thin film comprises a modified carbon nanotube and SnO2, wherein the mass ratio of the modified carbon nanotube and the SnO2 is (0.005-0.01):1. The preparation method comprises the steps of adding tin salt to a solvent to prepare a mixed solution, adding the modified carbon nanotube, and performing uniform stirring to prepare an electric heating film precursor liquid; and immersing a substrate after being pre-heated in the precursor liquid to naturally form a film, and annealing the plated substrate for 10-20 minutes under a condition of 450-550 DEG C. The composite electric heating film has the advantages of relatively small resistance, high emissivity, excellent thermal efficiency and high chemical stability, and an existing heating resistor or a heating component with poor thermal efficiency can be substituted; and meanwhile, the preparation method is simple and is energy-saving and environmental-friendly, and industrial production can be achieved.